Admin Section: misc templates corrections and improvments

* reset admin vertical menu custom styles
* disable icons in admin vertical menu
* fix main content positioning in admin section
* fix table appearance in admin crud template
* new scope/center form: move submit button in record_action sticky area
* edit scope/center form: move submit button in record_action sticky area
* improve homogeneity in admin index pages: centers/scopes/users/jobs
* remove centered div old tags

src/Bundle/ChillPersonBundle/Menu/AdminAccompanyingCourseMenuBuilder.php

@@ -39,7 +39,7 @@ class AdminAccompanyingCourseMenuBuilder implements LocalMenuBuilderInterface
             ->setAttribute('class', 'list-group-item-header')
             ->setExtras([
                 'order' => 2200,
-                'icons' => ['random'],
+                //'icons' => ['random'],
             ]);
 
         $menu->addChild('person_admin.closing motives', [

src/Bundle/ChillPersonBundle/Menu/AdminHouseholdMenuBuilder.php

@@ -39,7 +39,7 @@ class AdminHouseholdMenuBuilder implements LocalMenuBuilderInterface
             ->setAttribute('class', 'list-group-item-header')
             ->setExtras([
                 'order' => 2100,
-                'icons' => ['home'],
+                //'icons' => ['home'],
             ]);
 
         $menu->addChild('Position', [

src/Bundle/ChillPersonBundle/Menu/AdminPersonMenuBuilder.php

@@ -39,7 +39,7 @@ class AdminPersonMenuBuilder implements LocalMenuBuilderInterface
             ->setAttribute('class', 'list-group-item-header')
             ->setExtras([
                 'order' => 2000,
-                'icons' => ['child'],
+                //'icons' => ['child'],
             ]);
 
         $menu->addChild('Civility', [

src/Bundle/ChillPersonBundle/Menu/AdminSocialWorkMenuBuilder.php

@@ -39,7 +39,7 @@ class AdminSocialWorkMenuBuilder implements LocalMenuBuilderInterface
             ->setAttribute('class', 'list-group-item-header')
             ->setExtras([
                 'order' => 2300,
-                'icons' => ['handshake-o'],
+                //'icons' => ['handshake-o'],
             ]);
 
         $menu->addChild('person_admin.social_action', [